diff options
| author | Hugh Dickins <hughd@google.com> | 2014-08-28 19:34:13 +0100 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-09-26 11:51:50 +0200 |
| commit | 75858faa45de3bef7519b046f5453c2d7a3527c7 (patch) | |
| tree | a2c26b510ada5422f118f9968d63dc2a1c66ace2 /usr | |
| parent | 73210d0adac4c6f283eb825e85febdc12dbd3e36 (diff) | |
mm: fix bad rss-counter if remap_file_pages raced migration
commit 887843961c4b4681ee993c36d4997bf4b4aa8253 upstream.
Fix some "Bad rss-counter state" reports on exit, arising from the
interaction between page migration and remap_file_pages(): zap_pte()
must count a migration entry when zapping it.
And yes, it is possible (though very unusual) to find an anon page or
swap entry in a VM_SHARED nonlinear mapping: coming from that horrid
get_user_pages(write, force) case which COWs even in a shared mapping.
Signed-off-by: Hugh Dickins <hughd@google.com>
Tested-by: Sasha Levin sasha.levin@oracle.com>
Tested-by: Dave Jones davej@redhat.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'usr')
0 files changed, 0 insertions, 0 deletions